- Cost to restore: 1,500 crystals
- Location: Dais
- Effect: The user's RDM is doubled (x2), but the Battle Menu is disabled.
This sealstone could theoretically be helpful to carry if you are not confident in your ability to avoid enemy attacks, but forfeiting the Battle Menu is a significant handicap. Since the enemies are not affected by this, the sealstone is also detrimental on a dais. There is no need to restore it, as this is the last dungeon in the main game and there is no use for defensive sealstones in the Seraphic Gate. Moreover, it is too costly to restore simply to increase the withdrawal limit in the dungeon. It is thus best moved to a shell.
The name of the sealstone evokes the idea of the users barricading themselves inside a castle (hence the RDM increase), but not having planned anything beyond the immediate need to take shelter (hence the inability to use the Battle Menu).